Been dreading this all day as I didn't think I could run for 3 minutes non stop. I joined a jogging club last week and we did six reps of 2 minute runs/90 second rests. I really struggled to run for 2 minutes non stop so I thought 3 minutes would be beyond me. Do you know what? I managed it! It wasn't easy, and the last 3 minutes seemed to go on forever, but I made it.
Must be making progress!